Chrome 141/Firefox 140 storage access activation per origin #28682
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cfredric
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Dec 16, 2025
Co-authored-by: Chris Fredrickson <[email protected]>
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Summary
While using the Storage Access API, when embedded content activates a previously-granted
storage-accesspermission via therequestStorageAccess()method, 3rd party cookies are now only sent with requests to the calling embed's exact origin.Previously, 3rd party cookies were sent with requests to the calling embed's site.
This behavioral change has occurred in:
This PR adds notes in relevant places to document this change.
cc @cfredric / @hamishwillee — I'd appreciate your input on this one, folks.
Test results and supporting details
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